Material hoist or elevator



March 5, 1940. M; GIBBS MATERIAL HOIST 0R ELEVATOR Filed June 16, 1939 3 Sheets-Sheet l Inventor 2[z 2.625

A itorneys m WW March 51940. M. L. GIBBS MATERIAL HOIST OR ELEVATOR s Sheets-Sheet 2 Filed June 16, 1939 my Z In uenior all. {2663 owl A iiomeys Patented Mar. 5, 1940 UNITED STATES;

MATERIAL HOIST R ELEVATOR Martin L. Gibbs, Flagstaff, Ariz.

Application June l6, 1939, Serial No. 279,566

3 Claims.

This invention relates to hoists or elevators especially adapted for construction work, wherein it is desired to elevate building materials and the like to various floor levels during the construction of a building, and has for the primary object the provision of a device of this character which will be extremely easy to set up for 'operation and may be readily extended to various heights to match the height of the building as the latter is constructed, and includes an automatic unloading feature whereby materials may be elevated to a selected height and then automatically unloaded onto the building and also has accommodations for material carrying devices such as wheelbarrows and the like that may be brought to any selected height with respect to the building by the device and then easily rolled or moved onto the building,

Another object of this invention is the pro- 10. vision of safety devices which will obviate any possibility of the cage of the device jumping the tracks and which will permit the cage to raise and lower with a minimum amount of friction.

With these and other objects in view,'the in- 26 vention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of my invention,

80 reference is to be had to the following description and accompanying drawings, in which:

Figure 1 is a transverse sectional view illustrating a hoist or elevator constructed in accordance with my invention and showing the 85 same associated with a portion of a building under construction.

Figure 2 is a fragmentary transverse sectional view showing the automatic unloading feature of the device.

49 Figure 3 is a fragmentary front elevation illustrating the device.

Figure 4 is a longitudinal sectional view illustrating the safety devices for the slidable mounting of the cage.

Figure 5 is a fragmentary sectional view showing one of the anti-friction rollers forming a part of one of the safety devices and its combined yieldable mounting and guard.

Figure 6 is a fragmentary sectional view illus- 5o trating one of the rollers taken at right angles to Figure 5.

Figure 7 is a fragmentary side elevation illustrating one of the rollers and its yieldable mounting and guard.

Figure 8 is a fragmentary elevational view showing how the tracks are jointed to permit the'tracks to be extended in height as thebuildi'ng progresses in its construction.

Referring to detail to the drawings, the char acter '5 indicates diagrammatically a fragmen- 5-' tary portion of'a building under construction wherein the uppermost floor level thereof is indicated by the character 6' and has associated therewith an inclined chute 1 for the purpose of directing materials onto the floor level 6.

To assemble and associate the present invention with a building under construction as shown, a pit 8 is located in'the ground adjacent the building and has arranged therein a suitable foundation 9 which supports vertically arranged tracks Ill consisting of detachable sections whereby the height of the tracks may be increased by adding sections'there'to as the building progresses in height. One of the joints of the tracks is indicated generally by the character I! in Figure 8.

-If desired, braces l2'may be arranged between the tracks ID and the building. Certain of the braces may be employed for the support of the inclined chute l, as clearly shown in Figure l.

Each track is of channeled formation and includes an oblong portion l3 in cross section and a restricted throat portion 64 on which are formed opposed rails l5 of triangular shape in cross section.

A cage I6 is mounted for free sliding movement on the tracks ill and includes a floor if having connected to opposite sides thereof guard rails l8 which rise vertically from the floor. I! and are of channeled formation and are freely received within the tracks H) and of a cross sec-. tional shape to substantially match the shape of the tracks l0 and include laterally extending attaching portions H! on which are formed right angularly disposed flanges 20 apertured to re- 4D ceive bolts or like fasteners 2 land also provided with slots 22 to receive grooved pulleys 23 which ride the'rails I5 in pairs. The axles of the pulleys are indicated by the character 24 and are carried by guard elements 25 which overlie the pulleys and are apertured to receive the bolts or like fasteners 2|. Coil springs 26 are carried by the bolts and bear against the guards for yieldably connecting the guards onto the safety rails. The guard rails fitting within the tracks I0 obviate any possibility of the cage from becoming disconnected from the tracks during the raising and lowering of the cage. The grooved pulleys 23 riding the rails of the tracks prevent the guard rails from dragging or frictionally engaging with the tracks. Consequently the cage may slide upwardly and downwardly with friction reduced to a minimum.

The upper ends of the tracks II] are connected by a cross head 21 to which is connected one end of a cable 28 and also a pulley 29. The floor I! of the cage is provided with several slots 30 through which the runs of the cable may pass freely and mounted on the under side of the floor l! is a pulley 3| over which the cable is trained. The cable after leaving the pulley 3| passes upwardly and over the pulley 29 and then downwardly through one of the slots and over a pulley 32 mounted on the foundation or base 9 Within the pit and may be connected to a winch or other to the platform for retaining thereon building materials. The gate 35 carries rollers 36 which ride upon the tracks during the raising and lowering of the cage until the cage is elevated toa height wherein the gate may swing downwardly over the cross head and become aligned with the chute to permit the materials on the platform to gravitate therefrom over the gate and chute onto the uppermost floor level of the building.

The floor I1 provides accommodation for wheelbarrows and the like on which materials are placed. The wheelbarrows or similar conveyances may be readily rolled onto the floor I! of the cage when the floor is brought to ground level and then elevated to a selected floor level of the building and as the cage extends in close proximity to the wall of the building, as shown in Figure 1, the wheelbarrows or like conveyances may be readily rolled onto the building from the floor of the cage.

After the materials I have automatically unloaded from the platform 34 and the cage starts its descending movement the gate 35 swings up- Wardly due to its contact with the cross head and becomes engaged for riding movement on the rails during the rest of the descent of the cage so as to position itself ready to retain materials on the platform 34 when the latter is again loaded. It will be seen that the loading of the platform 34 can easily take place from the surface of the ground by reference to Figure 1 so that a comparatively short lift is necessary to raise the ma-' terial from the surface of the ground onto the platform.

It is believed that the foregoing description, when taken in connection with the drawings will fully set forth the construction and advantages of this invention to those skilled in the art to which such device relates, so that further detailed description will not be required.

What I claim is:

1. In a device of the character set forth, a supporting structure including vertically arranged channeled tracks each including an oblong shaped portion in cross section and a restricted throat portion, rails formed on the exterior of the throat portion, safety guide elements extending into said tracks and each including an oblong shaped portion in cross section located in the oblong shaped portions of the tracks and a throat portion extending through the throat portion of the tracks and terminating in oppositely extending attaching plates, a cage secured to said attaching plates,

pairs of pulleys mounted on the attaching plates and engaging the rails, said pulleys coacting in supporting the cage on the rails with the guide elements normally spaced from said tracks, and a hoisting mechanism connected with the cage and the supporting structure.

2. In a device of the character set forth, a supporting structure including vertically arranged channeled tracks each having oblong shaped portions in cross section and a restricted throat portion, rails formed on the exterior of the throat portion, safety guide elements extending into said tracks and each including an oblong shaped portion in cross section located in the oblong shaped portions of the tracks and a throat portion extending through the throat portion of the tracks and terminating in oppositely extending attaching plates, and flanges arranged at right angles to the plates, a cage secured to said plates, pairs of pulleys engaging the rails, combined guards and mountings for said pulleys and yieldably connected to said safety guide elements for supporting the latter free of the tracks during the sliding movement of the cage.

3. In a device of the character set forth, a supporting structure including vertically arranged channeled tracks, rails formed on the exterior of said tracks, safety guide elements extending in said channeled tracks and slidable vertically relative thereto and non-movable outwardly of said tracks in a lateral direction, attaching means for securing a hoist cable to said guide elements, and pulleys mounted on said means and riding said rails.

MARTIN L. GIBBS. 

